While Fairy Tail and Saber Tooth explore the newly surfaced island, the two guilds are attacked by a giant sea serpent caught on the island. The serpent traps Natsu, Lucy, Happy, and Kemo-Kemo in the ruins on the island, while everyone else succumbs to a mysterious virus. Lucy deciphers the glyphs in the ruins and discovers Kemo-Kemo to be a guardian deity that protects those on the island from the virus. Kemo-Kemo grows into a giant and defeats the serpent alongside Natsu, curing everyone in the process. However, Kemo-Kemo merges with the island as it sinks into the ocean, leaving a seed behind that Natsu plants in front of his house in memory of Kemo-Kemo.